A New Method for the Measurement of Internal Stress in Electrodeposits

Summary

The paper outlines the principle of a method and describes an instrument for measuring internal stress in electrodeposits. The method consists in plating both sides of a thin steel strip and accurate measurement of length changes during plating by means of a precision dial gauge. The value of internal stress is then calculated from the length change measured. The particular advantage of the method is that it permits even very low values of internal stress to be measured to a comparatively high degree of accuracy. Measurement is made with a portable instrument which is equally suitable for laboratory research and for direct control of electroplating baths. Some results obtained with bright nickel deposits are also reported.